Osama S. Faragallah^1,*, Ashraf Afifi¹, Ibrahim F. Elashry², Ensherah A. Naeem³, Heba M. El-Hoseny⁴, Ahmed I. Sallam⁵, Hala S. El-sayed⁶

CMC-Computers, Materials & Continua, Vol.72, No.2, pp. 3651-3663, 2022, DOI:10.32604/cmc.2022.019827 - 29 March 2022

Abstract In the last few years, videos became the most common form of information transmitted over the internet, and a lot of the traffic is confidential and must be protected and delivered safely to its intended users. This introduces the challenges of presenting encryption systems that can encode videos securely and efficiently at the same time. This paper presents an efficient opto-video encryption system using Logistic Adjusted Sine map (LASM) in the Fractional Fourier Transform (FrFT). In the presented opto-video LASM-based FrFT scheme, the encoded video is split into distinct frames and transformed into optical signals… More >

Walid El-Shafai¹, Moustafa H. Aly², Abeer D. Algarni^3,*, Fathi E. Abd El-Samie^1,3, Naglaa F. Soliman^3,4

CMC-Computers, Materials & Continua, Vol.70, No.1, pp. 895-913, 2022, DOI:10.32604/cmc.2022.018545 - 07 September 2021

Abstract Due to the rapid growth of telemedicine and healthcare services, color medical image security applications have been expanded precipitously. In this paper, an asymmetric PTFrFT (Phase Truncated Fractional Fourier Transform)-based color medical image cryptosystem is suggested. Two different phases in the fractional Fourier and output planes are provided as deciphering keys. Accordingly, the ciphering keys will not be employed for the deciphering procedure. Thus, the introduced PTFrFT algorithm comprises asymmetric ciphering and deciphering processes in contrast to the traditional optical symmetric OSH (Optical Scanning Holography) and DRPE (Double Random Phase Encoding) algorithms. One of the More >